You can change the SSL mode of Threat Manager at any time.
To change the SSL mode of an iManage Threat Manager appliance provisioned with the OVA, refer to the Optional configuration: Changing the SSL mode of Threat Manager section of Provisioning the iManage Threat Manager Open Virtual Appliance (OVA) in iManage Threat Manager Installation Guide.
To change the SSL mode of an iManage Threat Manager appliance provisioned manually (self-built), refer to the Changing the SSL mode of Threat Manager section of Steps to Build the Appliance in iManage Threat Manager Installation Guide.